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Aqueduct stenosis - obstructive hydrocephalus

Case contributed by Ammar Haouimi
Diagnosis almost certain


Signs of raised intracranial pressure.

Patient Data

Age: 45 years
Gender: Male

The MRI sequences demonstrate a marked dilatation of the 3rd and lateral ventricles with mild periventricular interstitial edema, indicating obstructive hydrocephalus. The sagittal FIESTA sequence shows an aqueductal web or diaphragm with normal size and configuration of the 4th ventricle.

Case Discussion

MRI features of aqueductal stenosis (web or diaphragm) with obstructive hydrocephalus.

Aqueductal stenosis is considered as the most common cause of congenital obstructive hydrocephalus, It can also be seen in adults as an acquired abnormality as in this case.

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